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https://issues.apache.org/jira/browse/MRUNIT-66?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13482436#comment-13482436
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Carlos Espinoza commented on MRUNIT-66:
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Thanks Jim. I haven't had to use MapReduceDriver. Only MapDriver or
ReduceDriver individually. The null check would be good if there is a way of
telling that a key/value is being used as an intermediate key.
> null input checks and behavior on no input to a driver are inconsistent
> -----------------------------------------------------------------------
>
> Key: MRUNIT-66
> URL: https://issues.apache.org/jira/browse/MRUNIT-66
> Project: MRUnit
> Issue Type: Improvement
> Affects Versions: 0.8.1
> Reporter: Jim Donofrio
> Assignee: Jim Donofrio
> Priority: Minor
> Fix For: 0.9.0
>
>
> the MapDriver class does not allow null input values if using setInput(Pair)
> but does allow null input if using setInputKey, setInputValue, or
> setInput(key, value)
> Also the MapDriver, ReduceDriver classes will throw null pointer exceptions
> with no input while the MapReduceDriver and Pipeline classes will just log
> warnings
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